Kits for BMW A90 MKV Supra B58 3.0L

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BMW fuel system kits provide a comprehensive solution for maintaining and upgrading the fuel delivery system, ensuring optimal engine performance and efficiency. Over time, fuel pumps, injectors, filters, and pressure regulators can wear out, leading to poor fuel economy, hard starts, misfires, and engine hesitation. Common problems include clogged fuel injectors, failing fuel pumps, and fuel pressure inconsistencies, which can result in rough idling and reduced power. Upgrading or replacing worn components with a complete BMW fuel system kit restores proper fuel flow, enhances throttle response, and improves overall drivability. Our selection of OEM and high-performance BMW fuel system kits includes everything needed for a reliable fuel system refresh, ensuring a precise fit and long-lasting durability for a wide range of BMW models.
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BMW B46 B48 B58 Motiv ReFlex 0-10 Bar Pressure Sensor
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Motiv Motorsports - Corporate Logo
T#:28537533
Part#: 101-0216
In Stock
$ 105.00 USD
Free Shipping on orders $49 and up

BMW B46 B48 B58 Motiv ReFlex 0-10 Bar Pressure Sensor is designed for accurate measurement of fluid and air pressure in high-performance applications. Ideal for monitoring a variety of pressures including fuel, boost, coolant, and oil, this sensor provides crucial data for optimizing vehicle performance.

Featuring a 2-Pin DTM connector, this sensor offers a direct plug-and-play connection to the ReFlex+ harness, ensuring a seamless integration with flash platforms via CANbus. Each ReFlex+ unit can support up to two of these sensors, allowing for comprehensive monitoring.

  • Versatile Measurement: Capable of measuring fuel pressure, boost, coolant, oil, and other fluids.
  • Easy Integration: 2-Pin DTM connector provides a direct plug-and-play connection.
  • Comprehensive Monitoring: Supports integration of up to two sensors per ReFlex+ unit.
  • High-Performance Design: Designed to handle high pressures and deliver accurate readings.

For optimal installation, consider using the 3/8 Female to 3/8 Male SAE Quick Disconnect Adapter with a 1/8" NPT port on an ethanol sensor or the 5/16 Female to 5/16 Male SAE Quick Disconnect Adapter with a 1/8" NPT port on a factory fuel line. Please note that the ethanol sensor is not included.

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BM3 B58 Gen2 Flex Fuel ECA Kit
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Bootmod3 - Corporate Logo
T#:40038648
Part#: BM3B58OEMHPFP
Ships on Jun 19, 2026
$ 499.00 USD
Free Shipping on orders $49 and up
MTX-D: Ethanol Content % And Fuel Temperature Gauge
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Innovate Motorsports - Corporate Logo
T#:22558994
Part#: INN3904
In Stock at Vendor
14% off MSRP $ 313.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 269.00 USD
Free Shipping on orders $49 and up
14% off MSRP
$ 313.99

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 269.00 USD
Free Shipping on orders $49 and up

Introducing the Innovate Motorsports MTX Digital Series "Dual Function" Gauges – now available! These 2 1/16" (52mm) gauges come with interchangeable faceplates and bezels, locking connectors for simplified installation, and MTS serial connections for seamless integration with other Innovate devices for data logging.

DISPLAY RANGE

  • Ethanol Content %: 0-100%
  • Temperature: -40-257 °F (-40-125°C)

KEY FEATURES

  • Ethanol Content
  • Error reporting for ethanol content sensor (Digital Display)
  • Fuel Temperature
  • Customizable exterior LED display
  • Programmable exterior LED color options
  • Selectable unit of measure in °F or °C
  • Programmable fuel temperature warning (outer LED)
  • 2-Configurable analog outputs
  • Ethanol Content: 0v = 0%, 5v = 100%
  • Fuel Temperature: 0v = -40 °F, 5v = 257 °F (-40-125°C)

MTX-D: Ethanol Content Percentage & Fuel Temp Gauge Kit includes Gauge (Black Faceplate, Black Bezel), Silver Bezel & White Faceplate, Harness, Program Cable (Serial), Ethanol Content Sensor, Quick Start Installation Guide.

Please note that this is a universal fitment gauge, and installation may vary depending on the vehicle.

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JB4PRO Flex Fuel Add On Harness - B58/S58
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Burger Motorsports - Corporate Logo
T#:49822568
Part#: JB4PB58FFAOH
In Stock
New Item
$ 49.00 USD
Free Shipping on orders $49 and up
Take your B58 or S58 build further with the JB4PRO Flex Fuel Add-On Harness—a simple, plug-and-play way to add an ethanol sensor and optional fuel pressure sensor to your JB4PRO setup. Keep your install clean, your wiring organized, and your tune dialed to match every fuel blend in the tank. Why it matters: Plug & Play: Connects directly to your JB4PRO—no cutting or splicing required. Sensor Ready: Supports ethanol and fuel pressure sensors for precise, real-time fueling adjustments. Clean, Safe Installation: Includes a 12 V adapter and inline fuse for hassle-free integration. How it works: This harness links your JB4PRO tuner to your flex fuel hardware. It’s not a complete flex fuel kit—you still need a compatible ethanol sensor—but it gives your JB4PRO the accurate readings it needs to adjust timing, boost, and fueling for E30, E50, or E85 blends.
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BM3 FlexFuel Kit - Engine Bay Location - BMW F-Chassis B58 B48 ...
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Bootmod3 - Corporate Logo
T#:36303296
Part#: BM3FFKFB58EB
In Stock
8% off MSRP $ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up
8% off MSRP
$ 649.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 599.00 USD
Free Shipping on orders $49 and up

We are proud to bring out this truly awesome product that makes getting the required Flex Fuel hardware on your BMW with incredible ease and minimal effort, in your own driveway.


Our kit is entirely plug-and-play with the factory vehicle harness. No cutting or splicing of OEM wiring/connectors. It installs in minutes and can be removed without a trace on the car!


Our team used SolidWorks to design a Flow Optimized Flex Fuel Sensor Adapter (FFSA) to ensure fuel flow is unobstructed and with no added pressure drop at full fuel pump flow from the fuel tank to your motor when our kit is installed. This is important when pushing the factory fuel system with all the power Ethanol can provide over petrol!


Flex fuel sensor housing is designed to neatly install into the factory BMW fuel hat location.


Flex Fuel Sensor Adapter also contains two 1/8 NPT ports that allow installation of an auxiliary Fuel Pressure sensor for vehicles that don’t come with an OEM one from the factory for future use. Depending on fitment, either port can be used.


Install the bootmod3 Flex Fuel Plug and Play Kit and flash your flex fuel enabled bootmod3 OTS MultiMap or Custom Map in minutes and you’re off to the races never worrying about alcohol/petrol blend % in your fuel tank. It does not get better or easier than this!


bootmod3 FlexFuel Plug and Play Kit:


Minutes to install at home as opposed to hours at a shop with car up on lift fabricating/cutting into factory fuel lines and splicing/cutting/pinning into OEM electrical

4+ hours in time/cost savings to get going on Flex Fuel as compared to most other kits that require making custom fuel lines, fittings, and custom wiring! 

Fully reversible/removable and back to stock without a trace in minutes

Custom 3-piece Aluminum-6061 Flex Fuel sensor adapter with built-in sensor bypass to allow for obstruction-free fuel flow made to fit in the vehicle factory fuel hat area below the rear seat

All connecting points are sealed with fuel-safe Viton O-rings

Flex Fuel Sensor Adapter housing provides additional 1/8 NPT ports for optional Fuel Pressure sensor addition to vehicles without a factory one for bootmod3 CustomROM v2 support

CANBUS Enabled Ethanol Content Analyzer (ECA) that integrates with bootmod3 CustomROM for complete and seamless conversion of your BMW to FlexFuel for bootmod3 Flex Fuel enabled OTS MultiMaps and custom tunes with your bootmod3 tuner of choice

Power/CANBus 4-wire plug-and-play harness

100% Fully Plug and Play harness to the BMW Fuel Controller connectors (EKP3) on S55, N55 vehicles

100% Fully Plug and Play harness on the BMW Body Domain Controller (BDC/FEM) connector on Gen1 F-series B48/B58

Continental Flex Fuel sensor 3-wire harness

Custom Aluminum-6061 CANBus Enclosure for the bootmod3 ECA board

Custom, kink-free teflon braided line allowing plug-and-play installation with the OEM fuel hat and factory 5/16” or 3/8” fuel feed line. No cutting or new lines required.

-6 AN fitting by Racetronix

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B58 Port Injection Kit - Black - 950cc Injectors
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Precision Raceworks - Corporate Logo
T#:3239419
Part#: 601-0187
In Stock
$ 1,449.99 USD
Free Shipping on orders $49 and up

Precision Raceworks Stand Alone Auxiliary Fuel System - Dual Walbro 5...
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Precision Raceworks - Corporate Logo
T#:47679263
Part#: 601-0332
Ships in 10 Business Days
New Item
$ 2,228.99 USD
Free Shipping on orders $49 and up

The Precision Raceworks Stand-Alone Auxiliary Fuel System is the highest performing and most stable low-pressure fuel system on the market! Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection!

Since direct injection came out, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up. Historically, this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory-programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.

Additionally, the high-pressure pump control system dumps fuel back into the low-pressure system at high pressure, low volume, resulting in oscillations of the low-pressure fuel system.  Because of this, the DI system in the car is required to constantly make corrections to keep the target AFR in check.

With this stand-alone low-pressure fuel system dedicated to your port fueling, that is a thing of the past!  Get rock-solid fuel pressures at any pressure, run fuel pressures which are 1:1 scalable to boost pressure, flow more fuel with dedicated lines, run smaller injectors and still get more fuel than you did with large injectors (allowing for higher resolution), and put less demand on the car’s DI system to correct for fluctuations in pressure. Even your tuner will be grateful as the system makes tuning of port fueling even easier and more accurate. The list of benefits goes on and on!

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Precision Raceworks Stand Alone Auxiliary Fuel System - Walbro 535 Pu...
affirm Starting At 0% APR - Subject To Eligibility. See Lending Terms
Precision Raceworks - Corporate Logo
T#:47679262
Part#: 601-0333
Ships in 10 Business Days
New Item
$ 1,574.99 USD
Free Shipping on orders $49 and up

The Precision Raceworks Stand-Alone Auxiliary Fuel System is the highest performing and most stable low-pressure fuel system on the market! Forget about how things have been done and embrace the benefits of dedicated fueling for your port injection!

Since direct injection came out, enthusiasts have been adding port injection. With this came the need to upgrade the low-pressure fuel system to keep up. Historically, this was done by increasing the output of the main fuel system. Unfortunately, the main fuel pump is controlled using PWM by a factory-programmed controller designed to reduce output when target fuel pressure (typically 5 bar) is exceeded, creating a constant battle when pumps are added or upgraded. This limits upgraded fuel pumps from performing to their full potential.

Additionally, the high-pressure pump control system dumps fuel back into the low-pressure system at high pressure, low volume, resulting in oscillations of the low-pressure fuel system.  Because of this, the DI system in the car is required to constantly make corrections to keep the target AFR in check.

With this stand-alone low-pressure fuel system dedicated to your port fueling, that is a thing of the past!  Get rock-solid fuel pressures at any pressure, run fuel pressures which are 1:1 scalable to boost pressure, flow more fuel with dedicated lines, run smaller injectors and still get more fuel than you did with large injectors (allowing for higher resolution), and put less demand on the car’s DI system to correct for fluctuations in pressure. Even your tuner will be grateful as the system makes tuning of port fueling even easier and more accurate. The list of benefits goes on and on!

Show More Show Less